OKN
WOBD — Web of Biological DataWOBD

Connect to the public endpoint

A hosted instance of the WOBD/Proto-OKN assistant endpoint is available at https://apps.okn.us/okn-mcp/mcp. Point your MCP-capable client at that URL — no local installation required. Visiting it directly in a browser returns a JSON-RPC error (the endpoint speaks JSON-RPC, not HTTP GET); that is expected and does not indicate the server is down. Setup steps below cover the two most common clients; for additional clients and up-to-date screenshots, see the upstream mcp-proto-okn installation docs.

What this enables

Once connected, your assistant can discover Proto-OKN graphs, inspect graph metadata, run SPARQL queries, bridge identifiers, and return answers with source graph context. It is most useful for open-ended cross-graph questions; use guided queries when you want a fixed, reproducible form workflow.

Quick verification prompt

Generate a table of all Proto-OKN knowledge graphs with two columns: KG name and description. Use only the proto-okn connector tools.

Claude Desktop

Requires a Claude Pro or Max subscription. Download Claude Desktop from claude.ai/download.

  1. Launch Claude Desktop and open Claude → Settings.
  2. Choose Connectors from the Settings menu and click Add custom connector.
  3. Enter the name proto-okn and the URL https://apps.okn.us/okn-mcp/mcp.
  4. Once proto-okn appears in the connector list, click Configure and set tool permissions to Always allow.
  5. Start a new chat, click the + button, toggle proto-okn on, and turn Web search off.
  6. Try the verification prompt above. If the assistant returns a graph list, the connector is working.

Detailed walkthrough with screenshots: Claude Desktop setup guide.

ChatGPT

Requires a ChatGPT subscription and the ChatGPT web app — the desktop app does not currently support custom MCP services.

  1. Sign in at chatgpt.com and click your profile name/avatar in the bottom-left corner.
  2. Choose Settings from the menu, then open Apps → Advanced settings.
  3. Toggle Developer mode on. MCP services only work with developer mode enabled.
  4. Click Create app and enter:
    • Name: proto-okn
    • MCP Server URL: https://apps.okn.us/okn-mcp/mcp
  5. Start a new chat, click +, choose ... More ›, and select proto-okn. Turn Web search off.
  6. Try the verification prompt above. If the assistant returns a graph list, the connector is working.

Detailed walkthrough with screenshots: ChatGPT setup guide.